The title and cover art for "ball is infinite" reference a notorious Easter egg from Sonic CD, where toggling the sound test to a specific combination produces a screen depicting multiple copies of Sonic the Hedgehog with humanlike faces and text atop translating to "Infinite fun. Sega Enterprises. –Mazin Picture". The "ball is infinite" cover art similarly depicts multiple copies of Beat mimicking Sonic's pose with Quaver's face superimposed atop hers. Also like the Sonic CD screen, the text on the "ball is infinite" cover is written in Japanese with "infinite" represented by an infinity symbol, though an English translation is provided below. A looser translation of the Sonic CD screen's text, "Fun is infinite with Sega Enterprises," forms the basis of the song title.